#include <stdio.h>
/*
int prime(int n)
{
if(n%2==0)return n==2;
if(n==1)return 0;
int c;
for(c=3;c*c<=n;c+=2)
if(n%c==0)
return 0;
return 1;
}
 */
int prime(int n) {
  int c;
  for (c = 2; c *c <= n; c++)
    if (n % c == 0)
      return 0;
  return 1;
}
int check(int n) {
  int p;
  for (p = 3; p <= n / 2; p += 2)
    if (prime(p) && prime(n - p))
      return 1;
  return 0;
}
int main() {
  int start = 6, end = 20000000;
  int n;
  long long x = clock();
  for (n = start; n <= end; n += 2)
    if (!check(n))
      printf("Congratulations!!,for %d the theory is Wrong!\n", n);
  long long y = clock();
  printf("%.3f second(s)!", (y - x) / 1000.0);
  return 0;
}
